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HBD Run-10 data analysis

HBD Run-10 data analysis. I. Ravinovich WIS. Test production for run # 303424. 10 PRDFF segments were produced on Sunday, January 31 st Could not read in the beginning due to the absence of RICH calibrations for this run at RCF DB

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HBD Run-10 data analysis

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  1. HBD Run-10 data analysis I. Ravinovich WIS I. Ravinovich

  2. Test production for run # 303424 • 10 PRDFF segments were produced on Sunday, January 31st • Could not read in the beginning due to the absence of RICH calibrations for this run at RCF DB • Then Taku modified RICH code that allowed to use the calibrations from different run (302800) which was already at RCF DB • Out of ~300K peripheral events I could read only ~180K. Only 4 PRDFF segments went till the end (# 2, 3, 5, and 6), the rest 6 segments crashed at random places. • It was proved that HBD analysis module is not the source for these crashes, it could be other subsystem or something else I. Ravinovich

  3. Quality of the electrons in this run • Vertex: for HBD analysis we usually use +/-20 cm, so the good fraction of the events will be thrown away • DC track quality: usually for electron analysis we use (31||51||63). Perhaps DC experts should comment whether the quality distribution looks reasonable • According to Taku all RICH distributions looks as usual • Matching to EMC looks OK • And finally E/p made with usual quality and RICH cuts, looks fine • Did anybody looked at the track reconstruction problem found by Victor? I. Ravinovich

  4. HBD data after reconstruction • HBD data looks reasonable • Matching distributions are OK • The cluster size as expected • The charge distribution of the cluster matched to the electron track from Central Arm is very similar to one observed in Run-9 • Needs much more statistics to go to the pair level (Dalitz pairs) in order to check the HBD performance, namely number of p.e. per single electron I. Ravinovich

  5. What are the next steps? • As far as I know Jeff has launched a full production • The files are quickly appearing in dCashe • The analysis of the test run was done at WIS cluster • For that I restored a fresh DB from 1008 and installed a fresh offline libraries used for the test production • We really need to move fast, we are taking physics data and would like to check the performance of the HBD as soon as possible • I would like to transfer compactDSTs to WIS cluster and perform the FAST analysis there, they will take only ~0.5TB disk space, we can accommodate much more • We have to go over DSTs many times in order to first calibrate the detector, extract the gains for each module and for each run since we do not have yet running OnCal for HBD • Running at WIS cluster will allow us to finish it very quickly • I’ve tried to transfer the data this morning but somehow it is blocked from BNL side I. Ravinovich

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